John j



(No' Model.)

Patented Jan, 24, 1882.

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(No Model.) 2 Sheets-Sheet 2.

J. J. BURK.

NAIL DRIVING MACHINE. No. 252,834. Patented Ja11.24,1882.

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' NHTED STATE ATEN'E triers.

JOHN J. BURK, OF BUFFALO, NEW YORK, ASSIGNOR OF ONEHALF TO EDWARD M.JEVVETT, OF SAME PLACE.

NAlL-DRlVlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 252,834, dated January24,1882. Application filed October 3, 1881. (No model.)

To allwhom it may concern.-

Be it known that I, JOHN J. BURK, a citizen of the United States,residing in Buffalo, in the countyofErie and State of New York, haveinvented certain new and useful Improvements in Nail-Driving Machines,of which the following is a Specification.

The object pf my invention is to produce a reliable and rapid means fornailing hoops, boxes, 860., and clinchingthe nails when driven 5 and itconsists of the following elements: first, an oscillating drum or boxoperated by connections with the foot-step, for holding the nails anddropping them into the'usual inclined guideways, in combination with aseparating device, from which the nails are delivered one at a time tothe nail-receivingjaws; second, a nail-driving mechanism having anadjustable device for limiting its movement downward, in combinationwith a foot-step and its connections and operating mechanism; third,thenail receiving and guiding mechanism, whereby the nail is started intothe wood before the lowerjaws separate at the bottom, so that the end orpoint of the nail is guided to the exact point required, and isconsequently always driven straight; fourth, an inclinedverticallyadjustable anvil, by which the point of the nail is turned andclinched across the grain of the wood when driven,allof which will bemore clearly hereinafter shown and described by reference to thedrawings, in which- Figure 1 is a side elevation of the machinecomplete. Fig. 2 is a front elevation; Fig. 3, an enlarged frontelevation of a portion of the machine. Fig. 4 is an enlarged sectionalelevation of the guiding-jaws. Fig. 5 represents an enlarged top view ofthe receiving-jaws, and Fig. 6 is a top view of the nail-guiding 4ojaws.

The frame of the machine consists of the upper p'art,A, the twofrontlegs, a, and a back leg, a, to which a treadle, a which is forkedthe bars B and B being connected at the top by two horizontal bars, B

0 represents the inclined slotted guideway for the nails. It issupported by the frame 0 which is supported at the rear end by twojointed or swinging arms, 0. The front end, B, is connected with orforms a portion of the part 0, and is provided with holes 0, (see Fig.5,) through which the rods 13 pass, so that the front end of theinclined guideways O and the frame C have a. free up-and-down movementon said rods, while the rear portion swings on the joint 0 To the rearportion or upper part of the guideways and frame 0 is connected the nailbox or drum 0*. It is supported on an axis or shaft, 0", within ahopper, 0 having inclined sides cl, so that the nails, as they dropdown, will be guided into the opening D in the inclined guideways. (SeeFig. 3.) The nailbox 0 is provided with a ratchet-wheel, e, pawl e, andarm 6 which arm is rigidly fastened to the shaft 0 To the arm 6 isjointed a rod, D, (see Figs. 1 and 2,) by a bolt, (1, its opposite endbeing jointed to a frame, D which frame is supported at the back end soas to swing on two jointed arms, E, one on each side of theinclinedguideway-frame Its front end embraces the naildriving rod F and rests ona shoulder, F, which shoulder. is made adjustable by a set-screw, f. Theframe 1) is connected by a forked piece, F and a rod, f, with thetreadle or foot-piece a It will now be seen that a movement of thetreadle downward will cause the several parts named to move intotheposition shown by the dotted lines d in Fig. 1, and that the naildrum or box will be moved one notch forward, and

that a reverse movement of the foot-step will cause the pawl to moveback so as to catch another notch in the ratchet-wheel e.

WVhile the machine is operating the nails drop out of the'holes f in thena-ilbox (see Fig. 2) into the opening D, which isjust wide enough tocatch the heads and let the rest pass through. I The nails slide downthe slideway until onei, for instance, see Fig. 3- strikes the firstseparating-bar, G, when it is stopped, and the rest that follow lieagainst each other. The bar G passes through the side of the frame 0,which acts as a journal for it, and through one side of theinclinedguideway. It has both a longitudinal and aturning movement by means ofan arm, G a pin, F, on the side of the forked piece F, and an inclinedprojecting piece, G on the side of the frame C, the bar G being held ordrawn inward by a spiral spring, H, the arrangement being such that whenthe foot-step a? is moved downward the pin F also moves down against thearm G and causes it to turn the bar G, and the arm G while turning,moves against the inclined face of the projecting piece G therebycausing the bar G to move longitudinally outward, so as to allow a nailto pass by the end ofit and against the bar or pin G, which has in themeantime moved against or inward, so as to prevent the nail frompassing. The bar G passes through the opposite side of the frame (1 andthrough one side of the inclined guideway, (see Fig. 3,) and is bentupward and then in, so as to pass again through the side of the frame bywhich arrangement it is prevented from turning,while it has a freelongitudinal movement and is kept in position one way by the spring H,which is also connected to it by means of an arm, I, (see Figs. 2 and3,) and is forced the other way or outward by the upward movement of thetreadle and the inclined bar H, which is fastened to the opposite sideof the forked portion F, so as to move up and down with it. (See Figs. 2and 3.)

It will be seen from this construction that as the treadle is forceddown by the foot the bar or pin G will move out and let the nails slidedown the incline against the bar or pin G, which has at the same timemoved inward, and that when the movement of the treadle a is reversed bymeans of the spring I, when the pressure of the foot is taken otf fromit the bar G will move inward and pass in between the nail restingagainst the pin G and thenail above it, thereby separating it from therest. At or near the same time the pin G is moved out, so that theseparated nail can drop or pass farther down the inclined guideways.

It will be noticed that the turning movement, in addition to thelongitudinal movement, renders the barG more sure to enter between andseparate the nails. The nail, after leaving the pin G, passes down intothe nailreceiving jaws J, which are arranged so as to swing on pins orbolts J, (see Figs. 3 and 5,) and are kept closed by a spring, 9, sothat only room enough is left for the body of the nail to pass into theopening J (see Fig. 3,) where it is held loosely suspended by the head.In this position the end B of the inclined guideway, which has amovement up and down from B to the pin B, has been forced up by theupward movement of the forked piece F as it comes in contact with it inits upward movement at or about the point It, (see Fig. 1,) and it fallsagain by its own weight when the part F descends. The nail being heldloosely by the head, the body assumes a vertical position with the pointdownward, and when the footstep is forced down the nail-driver F is alsobrought down, and also the part B which brings the point of the nailover or within the hole K in the piece K. (See Figs. 3 and 4.) Thenaildriver F, when it strikes the head of the nail, forces thereceiving-jaws J open and the nail through them or between them into theguiding-jaws L L, (see Figs. 3 and 4,) which jaws are closed, as shownby the dotted lines a in Fig. 3, so that the hole between them in thatposition is a tapering bole, smaller at the bottom, so that the nail isguided into the exact point required. As the nail-driver completes itsmovement downward the guidingjaws are opened into the position shown inFig. 4 and the nail is driven through. the material to be nailed-a hoop,for instance, shown by dotted lines at in Fig. 2-and the point of thenail strikes the inclined anvil N and is turned over or clinched in thedirection of the incline. )Vhen the nail -driving bar is withdrawn thejaws L L are again forced together by the springs r r. (Shown in Fig.4.) The parts K K are in one piece, and are provided with holes similarto the holes 0, (shown in Fig. 5,) so that the rods or bars B can passthrough. The pin B (shown in Fig. 3) limits the movement of K upward.The anvil N is made vertically adjustable by means of the set-screws rr, (see Figs. 1 and 2,) and the movement of the nail-driving bar F islimited by the nut S. (See Figs. 1 and 2.) The vertical movement of theend B of the inclined guideway is also limited by the bolts T and thepin B, which also limits the upward movement of the part K. (See Fig.3.) The inclined anvil N is adjusted so that the article to be nailedmay be easily placed between it and the lower part of K, and when thenail is being driven the part K K moves down on the rods B only farenough to tightly clamp and hold the article to be nailed.

I claim as my invention- 7 1. In 'a nail-driving machine, a separatingnail-bar, G,having both a longitudinal and an oscillating movement, incombination with the arm G pin F inclined projecting piece G spring H,and their operating mechanism, substantially as and for the purposesdescribed.

2. The oscillating nail-box F and inclined guideway O, in combinationwith the longitudinally movable and oscillating nail-separating bar Gand the separating-bar G, with their operating mechanism, substantiallyas specified.

3. The inclined guideway C, in combination with the vertical rods B, endpiece, B, nailreceiving jaws J J, and spring g, for the purposesdescribed.

4. The parts K K, provided with the open- IIS ing K, in combination withthe nail-guiding the end piece, B adapted to move up and jaws L L andsprings r 1', for the purposes dedown on the rods B, in combination withthe 10 scribed. part K and the bolts T, for limiting" the ver- 5. Thecombination of the nail-driving bar tical movement ofthe gn'idewayf),asset forth.

5 F and its operating connections D F f, JOHN J. BURK.

and a with the vertically-adjustable anvil N, for the purposesspecified.

6. The inclined gnideway 0, provided with Witnesses:

JAMES SANGSTER, HUGH SANGSTER.

